Automatic vehicle tire-signal.



J. H. B'ROWN.

AUTOMATIC VEHICLE TIRE SIGNAL.

APPLICATION FILED DEC. 11, 1913.

1,1 1 1 6, v I Patented Apr. 27, 1915.

WITNESSES.- [N VENTOR.

A TTORIVEY.

JOHN H. naown, or MIDVALE, UTAH.

AUTOMATIG VEHICLE TIRE-SIGNAL.

Specification of Letters Patent.

' Patented Apr. 27, 1915.

Application filed December 11, 1913. Serial 119,806,105.

To all whom it may concern Be it known that I, JOHN H. BRowN, a

citizen of the United States, residing at.

Midvale, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Automatic Vehicle Tire-Signals, of which the following is a specification.

My invention relates to pneumatic pressure signals, and has for its object to provide an automatic device whereby a signal will be given when the pressure of air in a vehicle tire is excessive, or when it falls below a predetermined amount. These objects I accomplish with the device illustrated in the accompanying drawings in wh ch;

similar letters of reference indicate like parts throughout the several figures, and as described in the specification forming a part of this application and pointed out in the appended claims.

In the drawings in which I have shown a substantial embodiment of my invention, Figure 1 is an elevation thereof. Fig. 2 is a longitudinal section through the device on line as m of Fig. 1. Fig. 3 is an enlarged detail elevation of the air tube, parts in section. Fig. 4 is a fragmentary view in elevation of a wheel with the device in place thereon.

In filling vehicle tires of the pneumatic type it is desirable to have an automatic signal to indicate when the pressure of the air within the tire is so great that it will burst the tire. It is also ver desirable to have an automatic signal to mdicate when the pressure of air in said tires has fallen and the air escaped to such an extent that to continue to run the vehicle would cause injury to the tire.

The purpose of my invention is to provide and combine in one device, an air tube throughwhich compressed air is supplied within the tire, with means to automatically give a signal when the pressure of air is above or below'a predetermined amount.

In the drawings, the air tube is shown at 1, and has the usual means thereonfor securing it on the outer periphery of an inner tube of an automobile tire with portions thereof entering the tire. Within said tube 1 is provided any of the well known air valves 2. A portion of said tube 1 near the base is externally threaded as at 3; and portions of the peripheric face of said threaded portion are cut away to hold a Washer 4 against rotation. An internally threaded.

contact sleeve 5 is screwed on said tube 1, over the threaded portion 3, with other portions extending parallel with and surrounding a portion of said tube. A contact screw 6 is secured in the side of said sleeve 5. A

spiral spring 7 is carried on said tube 1 within said contact sleeve 5 and with one end thereof bearing against the threaded portion 3v of said tube. A sleeve 8, externally threaded is slidable and carried on said tube 1 and bears against the other end of said spring 7. A jam nut 11 is screwed on said sleeve 8 to engage a plate 10, that is rigidly fastened to the felly of the wheel to hold the device in place. An adjusting nut 9 is screwed on said sleeve 8, and is provided with a projecting flange, to which an insulating sleeve 13, having a longitudinally disposed slot 14 therein, is fastened.

Said insulating sleeve 13 is slidably operated over said contact sleeve 5 to insulate there- Any vertical or longitudinal movement of said sleeve 8 is imparted to said contact member 12. A longitudinally disposed, elliptical slot 15 is cut in the side of said contact member 12. A portion'of said tube 1 is extended through the felly of the wheel and is externally threaded, as at 16, on which a tension nut 17 is screwed. The tension of said spring 7 is adjusted and held by nut 17. A wire 18 connectsthe said contact member 12 with the signal which is not shown, but may be in any of the well known forms of lights, bells or horns. Said signal may be in electric contact with any portion of the device and wheel except said contact member 12, and an electric circuit is completed when said member 12 is made to touch said contact screw 6. This may occur when the 6 is moved laterally in either direction within said slots 14 and 15 it will touch the portion of said contact member 12, shown at 12 in Fig. 1, and complete an electric circuit and operate the signal.

Having thus described my invention I dewhich said contact sleeve is operated and provided with a longitudinally disposedslot in the side; a contact member fastened on said insulating sleeve having a slot therein contiguous the slot in said insulat-' ing sleeve; and a jam nut screwed on said threaded sleeve to fasten the deexternally vice to the felly of a wheel. a

2. Ina device of the class described the combination of an air tube; a contact sleeve secured on said tube; a detachable contact point on the face of said contact sleeve; an

insulating member within which said con-; tact sleeve is, operated, having a slot therein .within which said contact point is operated;

a contact member fastened on said-insulating member having a slot therein contiguous the slot mentioned; a spiral spring carried on said air tube and within said insulating member; an externally threaded member carried on said air tube and bearing against said spring; an adjusting nut thereon hav'- ,ing a portion fastened to said insulating member; a felly plate; and a jam nut to hol'd. said plate against said adjusting nut.

In testimony whereof I have'aflixed my signature in presence of two witnesses.

v, n 'JOHN H. BROWN. ."Witnesses: z

'- Tnoms,

" Mrs. G'.' C.BRowN'. 

